1245211321 has 8 divisors (see below), whose sum is σ = 1253541888. Its totient is φ = 1236900000.

The previous prime is 1245211301. The next prime is 1245211337. The reversal of 1245211321 is 1231125421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1245211321 - 2²⁵ = 1211656889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1245211292 and 1245211301.

It is not an unprimeable number, because it can be changed into a prime (1245211301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139101 + ... + 147781.

It is an arithmetic number, because the mean of its divisors is an integer number (156692736).

Almost surely, 2^1245211321 is an apocalyptic number.

It is an amenable number.

1245211321 is a deficient number, since it is larger than the sum of its proper divisors (8330567).

1245211321 is an equidigital number, since it uses as much as digits as its factorization.

1245211321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9623.

The product of its digits is 480, while the sum is 22.

The square root of 1245211321 is about 35287.5519269898. The cubic root of 1245211321 is about 1075.8399985161.

Adding to 1245211321 its reverse (1231125421), we get a palindrome (2476336742).

The spelling of 1245211321 in words is "one billion, two hundred forty-five million, two hundred eleven thousand, three hundred twenty-one".